
Franklin Armory BFSIII AR-Essential Binary Trigger
- 3-position selector (safe / semi / binary)
- Fires one round on pull, one on release in binary mode
State Legality MatrixBinary TriggersArkansas
Statute-cited, last verified 2026-07-31
Legal
Yes. No state statute restricts binary triggers.
The statute in practice
Arkansas sections 5-73-104 and 5-73-105 pair the state's prohibited-weapons offense with exceptions for legitimate manufacture, repair, and transport. The provisions surfaced in ATF's Arkansas compendium do not name binary triggers, so the device's one shot on pull and one on release must be analyzed under the text actually defining the covered weapon.
Federal law
Binary triggers are legal under federal law and are not machine guns under 26 U.S.C. § 5845(b); ATF treats the trigger pull and the trigger release as two separate functions of the trigger, so one round is fired per function. Cargill v. Garland (2024) concerned bump stocks, not binary triggers, and does not change this.
Scope: Binary triggers (Franklin Armory BFSIII and similar): fire one round on trigger pull and one on release. Forced reset triggers are a separate class.
Common questions
Yes. No state statute restricts binary triggers.
Binary triggers are legal under federal law and are not machine guns under 26 U.S.C. § 5845(b); ATF treats the trigger pull and the trigger release as two separate functions of the trigger, so one round is fired per function. Cargill v. Garland (2024) concerned bump stocks, not binary triggers, and does not change this.
What to buy
In a green state, these are the binaries that matter. Franklin Armory's BFSIII line covers AR, Scorpion, Stribog, and B&T hosts, and the Fostech Echo AR-II is the drop-in AR alternative.




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